• vur oak,
• nur oak,
• hur oak,
• gur oak,
• byr oak,
• bhr oak,
• bjr oak,
• bir oak,
• b8r oak,
• b7r oak,
• bue oak,
• bud oak,
• buf oak,
• but oak,
• bu5 oak,
• bu4 oak,
• bur iak,
• bur kak,
• bur lak,
• bur pak

The adjective form of "bur oak" is "bur-oaked".

The plural form of "bur oak" is "bur oaks".

The singular form of the word "bur oak" is "bur oak". The word "bur oak" refers to a specific type of oak tree, and its singular and plural forms do not change.